i see the instructions, especially the "sand castel" explanations, it say " you should imagine it in wet sand"
i dont imagine my scorpion in wet sand !
but i've saw an another scorpion on the website in gold and legs seem fine too

what do you think ?

Question 2 : another way

if it's not possible in glass or metal, i can buy it in black detailed or in frozen utlradetail ...
how to have a very gloss aspect or a gold aspect ?
paint, varnish, resin...acrylick, epoxy, polyurethane... ???

Your scorpion looks to be about the same size as this one here http://shpws.me/llFs. If the legs are at least 2mm thick minimum, then they should be ok for the gold effect stainless but the problem area will be the thin part pf the claws - these will need to be thicker to support the weight of the claws.

As for my models that JACANT referenced, they are the models converted to hollow space within a block by creating a very small hole/tunnel joining the model to the outside of the block, the shapes you see are trapped support material within a solid chunk of Frosted Ultra Detail.